hi everyone, i just got this fish yesterday and so far he seems to be doing good. He is eating pellets and frozen cyclop-eeze. I have read that they are peaceful and can reach up to 4". Right now, he is around 2". Should i have any problems with a cleaner shrimp that has pretty much been in the tank from the beginning? also, do they sleep in the sand like wrasses because last night, he didn't. Thanks!